A：Did you ever take History 231?
B：Yeah. Last semester.
A：Who was the professor?
B：It was Professor Johnson.
A：I have him this semester. What do you think about him?
B：He's a terrible instructor and demands a lot, but fortunately, he's an easy grader.
A：What did you end up getting?
B：I got an A-. Sounds good, but none of my test scores were that high, so I don't know how I got a decent grade.
A：That's probably because he grades on a curve.
B：Are you enjoying the class so far?
A：I hate it and I was about to withdrawal. But after hearing your experience, I think I will tough it out.
B：Yes. Definitely stay in the class. You will get a better grade than your test scores. He does that deliberately to make all the students study a lot.
A：Thanks for letting me know. I feel relieved now.